{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["process characterization", "process parameter", "concept or principle", "manufacturing standard", "engineering feature", "material"], "input": "Even though UAM has been demonstrated to produce robust metal builds in Al–Al , Al–Ti , Al-steel , Cu–Cu , Al–Cu , and other material systems , UAM welding of high strength steels has proven challenging ."}
{"process characterization": ["builds"], "process parameter": [], "concept or principle": [], "manufacturing standard": [], "engineering feature": [], "material": ["metal", "material", "steels"]}